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Microplastics removal from aquatic environment by coagulation: Selecting the best coagulant based on variables determined from a systematic review

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Title: Microplastics removal from aquatic environment by coagulation: Selecting the best coagulant based on variables determined from a systematic review
Authors: Nahid Azizi, Meghdad Pirsaheb, Neamat Jaafarzadeh, Ramin Nabizadeh Nodehi
Source: Heliyon, Vol 9, Iss 5, Pp e15664- (2023)
Publisher Information: Elsevier, 2023.
Publication Year: 2023
Collection: LCC:Science (General)
LCC:Social sciences (General)
Subject Terms: Coagulation, Microplastic, Systematic review, Polyethylene, Polystyrene, Polyamide, Science (General), Q1-390, Social sciences (General), H1-99
More Details: The present study was carried out in the two phases of systematic review and experimental research. First, for the systematic review phase, Web of Science, Scopus, and PubMed as electronic databases were utilized to find research articles distributed up to March 5, 2021, related to the removal of microplastics by coagulation. In total, 104 publications were found, of which 14 were reviewed for deriving the variables and research design. Then, in the experimental phase, the experiment was carried out based on the variables derived from the systematic phase for three microplastic types (polyethylene, polystyrene, and polyamide) and five coagulants (polyaluminum chloride (PAC), ferric chloride (FeCl3), aluminum chloride (AlCl3), alum (Al(OH)3) and aluminum sulfate (Al2(SO4)3)) in bench scale study. The differences between removal efficiencies in terms of type, shape, concentration, and size of microplastics within the looked into article was analyzed utilizing ANOVA or Kruskal-Wallis test (for parametric or nonparametric analysis, respectively). The results of experimental phase show that the removal efficiency of different microplastics was significantly different, and it was equal to 65, 22, and 12% on average for PA, PS, and PE, respectively. These averages are much lower than the average removal efficiency calculated in the reviewed articles (78 and 52% for PS and PE, respectively). The removal efficiency of microplastics types by coagulants was not significantly different. As a result, a coagulant that has the lowest dose can be selected as the most suitable coagulant, which is Al(OH)3 in this study.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2405-8440
Relation: http://www.sciencedirect.com/science/article/pii/S2405844023028712; https://doaj.org/toc/2405-8440
DOI: 10.1016/j.heliyon.2023.e15664
Access URL: https://doaj.org/article/3ca8cd7129ba4f529764238784a757b6
Accession Number: edsdoj.3ca8cd7129ba4f529764238784a757b6
Database: Directory of Open Access Journals
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  Data: Heliyon, Vol 9, Iss 5, Pp e15664- (2023)
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  Data: The present study was carried out in the two phases of systematic review and experimental research. First, for the systematic review phase, Web of Science, Scopus, and PubMed as electronic databases were utilized to find research articles distributed up to March 5, 2021, related to the removal of microplastics by coagulation. In total, 104 publications were found, of which 14 were reviewed for deriving the variables and research design. Then, in the experimental phase, the experiment was carried out based on the variables derived from the systematic phase for three microplastic types (polyethylene, polystyrene, and polyamide) and five coagulants (polyaluminum chloride (PAC), ferric chloride (FeCl3), aluminum chloride (AlCl3), alum (Al(OH)3) and aluminum sulfate (Al2(SO4)3)) in bench scale study. The differences between removal efficiencies in terms of type, shape, concentration, and size of microplastics within the looked into article was analyzed utilizing ANOVA or Kruskal-Wallis test (for parametric or nonparametric analysis, respectively). The results of experimental phase show that the removal efficiency of different microplastics was significantly different, and it was equal to 65, 22, and 12% on average for PA, PS, and PE, respectively. These averages are much lower than the average removal efficiency calculated in the reviewed articles (78 and 52% for PS and PE, respectively). The removal efficiency of microplastics types by coagulants was not significantly different. As a result, a coagulant that has the lowest dose can be selected as the most suitable coagulant, which is Al(OH)3 in this study.
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      – Text: English
    Subjects:
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        Type: general
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      – SubjectFull: Systematic review
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